• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 D
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• pp.1797-1799
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• 1999

In this paper, to implement the electrical equivalent modeling of powder electroluminescent device, capacitate equation of device was chosen. The conventional structure device which have dielectric and phosphor layer between electrodes, and the single emission structure device which means that dielectric and phosphor were mixed between electrodes, were investigated. As a result, It was possible to make the equation that is transferred capacitance to phosphor layer, and using measured brightness efficiency and conductivity of devices was calculated.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1998년도 춘계학술대회 논문집
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• pp.391-394
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• 1998

Electroluminescence is the light emission obtained by an electrical excitation energy passing through a phosphor under an applied high electrical field. EL are paid much attention on flat panel display as a backlight and indicator, which are divided into ACPRL(alternating-current powder electroluminescent) and ACTFEL(alternating-current powder electroluminescent). In this paper, Electric and emission properties on ACPEL are investigated based on ZnS:Cu phosphor. The basic structure on this is ITO glass/phosphor/insulator/ backelectrode, CR-M which has high efficiency on thermal properties and dielectric Properties was introduced and BaTiO$_3$ as a insulating layer in order to increase app1ied electric field on phosphor. Changing on Dielectric and emission Properties was caused by a different viscosity of binder which filled on space between phosphor particle. 60cd/$m^2$ under 60V, 2kHz sinusoidal was gotten from ACPELD prepared in this work.

• 한국재료학회지
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• 제11권6호
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• pp.448-452
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• 2001

ZnS:Cu,Cl 형광체를 이용하여 ITO/glaas 기판위에 스크린인쇄법으로 적층형과 혼합형 구조로된 2종류의 교류전계 발광소자를 제작한 후 인가전압과 주파수에 따른 광학적, 전기적 특성을 조사, 비교하였다. 적층헝의 경우 발광휘도는 400Hz, 200V 구동전압에서 약 55 cd/$\m^2$를 나타내었다. 인가전압의 주파수를 400Hz에서 30Hz로 증가시킬 경우 휘도는 420 cd/$\m^2$로 크게 향상되었다. 혼합형의 경우 400Hz의 주파수에서 문턱전압은 45V이었고, 200V, 30KHz 주파수의 동작조건에서 최대휘도는 670 cd/$\m^2$ 이었다. 휘도-전압 특성 측정결과 적층형구조 보다 혼합형 소자구조에서 발광강도가 약 1.5배 증가하였다. 주파수에 따른 주발광 파장의 변화는 양쪽시료 모두 유사하게 나타났다. 1KHz이하의 저주파에서는 652 nm의 청녹색 발광과장을 나타내었으며 5KHz이상에서는 452 nm과장의 청색발광을 나타내었다.